Sub-irrigation channel



FIG. 1 is a top perspective view of the sub-irrigation channel;

FIG. 2 is a top side view thereof;

FIG. 3 is a bottom side view thereof;

FIG. 4 is a front side view thereof;

FIG. 5 is a rear side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a right side view thereof; and,

FIG. 8 is bottom perspective side view thereof. 

CLAIM We claim the ornamental design for a sub-irrigation channel, as shown and described. 